private MSR.LST.MDShow._AMMediaType copy_AMMediaType(UW.CSE.MDShow._AMMediaType uwmt)
{
MSR.LST.MDShow._AMMediaType msrmt = new MSR.LST.MDShow._AMMediaType();
msrmt.bFixedSizeSamples = uwmt.bFixedSizeSamples == 0?false:true;
msrmt.bTemporalCompression = uwmt.bTemporalCompression == 0?false:true;
msrmt.cbFormat = uwmt.cbFormat;
msrmt.formattype = uwmt.formattype;
msrmt.lSampleSize = uwmt.lSampleSize;
msrmt.majortype = uwmt.majortype;
msrmt.pbFormat = uwmt.pbFormat;
msrmt.punk = uwmt.punk;
msrmt.subtype = uwmt.subtype;
return(msrmt);
}
/// <summary>
/// Build a graph with sampleGrabber. Render it, and get the media type.
/// </summary>
/// <param name="payload"></param>
/// <returns></returns>
public bool Build(PayloadType payload, RtpStream newStream)
{
this.stream = newStream;
this.ssrc = newStream.SSRC;
//Required as of RC3:
this.stream.IsUsingNextFrame = true;
if ((ssrc == 0) || !((payload == PayloadType.dynamicVideo) || (payload == PayloadType.dynamicAudio)))
{
errorMsg = "Invalid inputs to build method.";
return(false);
}
fgm = new FilgraphManagerClass();
MSR.LST.MDShow.IBaseFilter bfSource = null;
IGraphBuilder iGB = (IGraphBuilder)fgm;
//if (false)
// rotnum = FilterGraph.AddToRot(iGB); //AddToRot(iGB);
try
{
bfSource = RtpSourceClass.CreateInstance();
((MSR.LST.MDShow.Filters.IRtpSource)bfSource).Initialize(this.stream);
iGB.AddFilter(bfSource, "RtpSource");
MSR.LST.MDShow.IPin sourceOutput = Filter.GetPin(bfSource, _PinDirection.PINDIR_OUTPUT, Guid.Empty,
Guid.Empty, false, 0);
//Add SampleGrabber filter
MSR.LST.MDShow.IBaseFilter bfGrabber = SampleGrabberClass.CreateInstance();
iGB.AddFilter(bfGrabber, "Grabber");
UW.CSE.MDShow.ISampleGrabber sgGrabber = (UW.CSE.MDShow.ISampleGrabber)bfGrabber;
//Set mediatype
UW.CSE.MDShow._AMMediaType mt = new UW.CSE.MDShow._AMMediaType();
if (payload == PayloadType.dynamicVideo)
{
mt.majortype = MediaType.MajorType.MEDIATYPE_Video;
//PRI2: RGB24 seems to work for all video? We have used YUY2 in the past, but that won't work
// for screen streaming. Probably could use more testing
//mt.subtype = MediaType.SubType.MEDIASUBTYPE_YUY2;
mt.subtype = MediaType.SubType.MEDIASUBTYPE_RGB24;
}
else
{
mt.majortype = MediaType.MajorType.MEDIATYPE_Audio;
mt.subtype = MediaType.SubType.MEDIASUBTYPE_PCM; //MEDIASUBTYPE_PCM;
}
sgGrabber.SetMediaType(ref mt);
//Add samplegrabber callback
//0 is sampleCB, 1 is bufferCB. Only bufferCB is actually returning data so far.
sgGrabber.SetCallback(callBack, 1);
sgGrabber.SetOneShot(0);
sgGrabber.SetBufferSamples(0);
iGB.Render(sourceOutput);
UW.CSE.MDShow._AMMediaType uwmt = new UW.CSE.MDShow._AMMediaType();
sgGrabber.GetConnectedMediaType(ref uwmt);
connectedMT = copy_AMMediaType(uwmt);
}
catch (Exception e)
{
errorMsg = e.Message;
Debug.WriteLine("Exception while building graph: " + e.ToString());
eventLog.WriteEntry("Exception while building graph: " + e.ToString(), EventLogEntryType.Error, 1001);
return(false);
}
return(true);
}
